Konftel 300Wx Wireless Conference Phone Display screen: LCD, 128x64 px (5x2.5) Keypad: Alphanumerical 0-9, *, on/R, off, mute, hold, volume up, volume down, 5 buttons for menu navigation, line mode, conference guide. Battery: 5200 mAh, up to 48 h talk time/400 h standby. Memory: Supports recording on SD memory cards up to 2 GB Color: Liquorice black